https://www.tomshardware.com/news/batman-arkham-knight-seasonofinfamy-dlc,30809.html
'Batman: Akrham Knight' Gets Final DLC Pack: 'Season of Infamy' | Tom's Hardware
Dec 22, 2015 - Rocksteady and WB Games released what is presumed to be the final DLC content pack for "Batman: Arkham Knight."